douglas



' thtttd @States @anni @twine JOSEPH w. DOUGLAS, Or MIDDLETOWN,cONNnorIcU'r,-Assicuon .fro w. e B. DOUGLAS, or .SAME PLAGE. LenersBaten: No. 102,664, daad my 3, 1870.

The Schedule referred to in thesev Letters Patent and making part of thesame.

To all whom 'it may concern: f

Beit known that I, JOSEPH W. DOUGLAS, of Middletown, in. the county ofMiddlesex, and State of Connecticut, have invented a new and usefulImprovement in Pumps, of which'the following is a full, clearfand exactdescription, reference being had to the accompanying drawing formingpart of this specification, and in lwhich Figure l represents alongitudinal view of a pump constructed in accordance with my invention,and

Figure 2, a central longitudinal section ofthe same, taken atrightangles to iig. 1. e

Figure 3 is a back view of one of the valves of the pump, inillustration of its attachment by means of bent pins or `hooks, undvFigure 4, a transverse section through the line :z: x in iig. 2, showinga modification of the pin attachment of the valve or valves.

Similar letters of referenceindicate corresponding parts.

This invention, which is applicable to either suction or force-pumps, orto common lift-pumps, consists in a novel attachment of the valve to itsplace in the pumpcylinder or valve-box, connected therewith at either orboth ends of the pump, by means of a Wire pin or pins,looselyprojected.through holes in the flexible portion of the v tive,and serving as a free hinge or fulcrum for the valve to swing on, withevery facility for detaching said valve when required, by slipping itfrom off the said pin or pins, that may either be straight or in theform of hooks.b

Also,'the invention includes a certain arrangement of side-plates, tofacilitate access to the valves.

By these improvements, the cost of constructing the pump is lessened, bydispensing with joints at the ends of the pump-cylinder or barrel,inasmuch as the cylinder and Valve-seats at the two .ends thereof may becast in one piece; also, leather is economized inv the'construction ofthe valves, and the liability to leakage, or imperfection in the Workingof the pump, reduced.

Referring to the accompanying drawing- A represents the cylinder orbarrel of the pump, and B the inlet and C the outlet-valves thereto,said valves being arranged at opposite. ends of the cylinder, or inboxes, D D, connected'therewith.

Access is had to the valves by means of side-plates,

E E, arranged to fit on or over the mouths of the boxes D D, and securedby means of hinged bolts, F

F, entering slotsfor openings a a in the' ends of the .of the cylinderfor such purpose, and cheapening the 4construction of the pump.

Furthermore, the liability to leakage and imperfec-- tion in the workingof 'the pump is reduced; also, I economize the leather in theconstruction of the valves, and facilitate their attachment and'detachment by hitchiug or hinging the valves, in a free orlooseuna'nner,'on` pins arranged to project through hole'sin theleather, and which form the working pivots or fulcra of the valves.

Thus, as represented in figs. 2` and v1.1, either valve may be hung on astraight wire pin', H, passed, so as to run in front and in rear,through slits or holes, o c,

made in the leather d of the valve, -and said pin, with the valve on it,let at its endsinto grooves e made in the endsv of the valve-box, insuch a manner as that, on taking oft' the side-plate which covers thelatter, the valve and its hinge-pin may be drawn out, and, whennecessary, said pin drawn out of the leather. Or, instead of there beinga single straight pin, bent pins or' hooks, H H, as shown in igs. 2 and3, may be used,the same being attached to theplate that covers thevalve-box, and made to project-through holes punched 'in the leather,-which establishes a like loose attachment of the valve, free from anybinding or bearing down of the leather at the hinge-portion of it, andallowing of the valves ready detachment on liftingof theside-plate whichcovers the mouth ofthe vvalve-chamber or box. lVhat is 'here claimed,and desired to be secured by Letters Patent,lis-

The valves of a pump suspended by pins passing through holes in theexible portion, whereby the advantages of a swinging joint are combinedwith the iiexibility of the material, substantially as set forth.

JOS. W. DOUGLAS.

. Witnesses:

DANL. W. RAYMOND, GEO. M. SMITH.

